Since graphene was first isolated [1]} many
other two dimensional materials have be discovered. Examples of these
are the semiconductor monolayer transition metal dichalcogenides (TMDs)
[2]}, the highly anisotropic phosphorene [3]},
or the insulator hexagonal boron nitride (hBN) [4]}.
Despite their own unique properties, these three materials have something
in common, all of them have an optical response dominated by excitonic
effects.
